[AR] Re: Flying to Orbit with Hydrogen?

  • From: Henry Vanderbilt <hvanderbilt@xxxxxxxxxxxxxx>
  • To: arocket@xxxxxxxxxxxxx
  • Date: Wed, 18 Dec 2019 09:10:45 -0700

C'mon, Doug.  After all, Harlan Ellison has pointed out that hydrogen is one of the two most common elements in the universe!

What was the other one he mentioned?  It'll come to me...

:-)

On 12/17/2019 2:46 PM, (Redacted sender randome for DMARC) wrote:


Craig, that’s bullshit, and you know it. On this planet, molecular hydrogen is expensive to manufacture, store, handle, and use. As long as you continue to deny this simple reality you will be a laughingstock. You should give it up, although I suspect you cannot.

-Doug Jones

"A fanatic is one who can’t change his mind and won’t change the subject."

-Winston Churchill


*From:* arocket-bounce@xxxxxxxxxxxxx <arocket-bounce@xxxxxxxxxxxxx> *On Behalf Of *Craig Fink
*Sent:* Sunday, December 15, 2019 11:51 PM
*To:* arocket@xxxxxxxxxxxxx
*Subject:* [AR] Re: Flying to Orbit with Hydrogen?

I like Doug Jones and You, Hydrogen flows off of the Sun, and is free>

On Sun, Dec 15, 2019 at 8:37 PM Henry Spencer <hspencer@xxxxxxxxxxxxx <mailto:hspencer@xxxxxxxxxxxxx>> wrote:

    On Sun, 15 Dec 2019, Craig Fink wrote:
    > Anybody interested?

    With any luck, no. :-)  As Doug Jones commented the last time you
    brought
    this up:

    "Craig, have you ever worked with LH2? I have, and it is a
    complete pain
    in the ass. Every step of the supply chain is expensive, slow to
    react to
    demand, and wasteful. It brings with it all the materials science
    hassles
    of embrittlement, the operational problems of *freezing* air,
    oxygen-enriched liquid air drips and _their_ dangers, expensive
    quantities
    of helium required for purges and pressurization, vacuum and aerogel
    insulation, and a dozen other ways in which it is a step far
    beyond other
    fuels. XCOR spent almost a decade learning how to handle LOX,
    alcohol,
    kerosene, and methane IN THAT ORDER before we tackled LH2... and
    we made
    it work but it was difficult for a full-time professional team with
    man-centuries of experience."

    Henry


--

Craig Fink
WeBeGood@xxxxxxxxx <mailto:WeBeGood@xxxxxxxxx>


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